Device and method for accelerating the destruction of at least two wake vortices, in particular aircraft wake vortices

Process for accelerating the destruction of at least two contra-rotating vortices (5A, 5B) which are created respectively in the wake of the wings (3A, 3B) of a moving body (2) provided with at least two wings (3A, 3B) in where each wing (3A, 3B) is provided with at least two lifting surfaces (3A, 6A; 3B, 6B) and which are separated by a distance between vortexes (D), each being formed of said contra-rotating vortices ( 5A, 5B) in the rear of the corresponding wing (3A, 3B) by the merging of at least two co-rotating eddies (7A, 8A; 7B, 8B) which are created respectively by the arrangement of said aerofoils (3A, 3B, 6A, 6B) of the wing (3A, 3B) each of said co-rotating eddies a plurality of instability modes in the core, characterized in that it is generated at the level of each of said wings (3A, 3B), near the creation area (10A, 10B) of at least one of said co-rotating eddies (8A, 8B) of the wing, a periodic perturbation of the flow, which corresponds to an instability of Bénard-von Karman and that each of said periodic perturbations has a wavelength that is suitable for exciting at least one of said instability modes of the corresponding eddy (8A, 8B) so as to increase the core of counterrotating vortex (5A, 5B) which is created from the unstable merging of this eddy (8A, 8B) with the other eddy (7A, 7B) so that the diameter (dA, dB) of said core becomes greater than a predetermined proportion of said distance between vortexes (D).